Overview
- WastewaterSCAN has tracked rising levels since mid-October, with notable increases in Louisiana, Michigan and Indiana, and multiple California plants reporting recent gains.
- CDC data show more than 13% test positivity in Western states in late November and 153 outbreaks reported through Nov. 13, fewer than at this point last year.
- Experts are monitoring the relatively new GII.17 strain as a plausible driver given lower population immunity, though evidence is still developing.
- Clusters are being reported in close quarters, including an AIDA Cruises ship with more than 100 cases, and clinicians warn about dehydration risks for children and older adults.
- There is no vaccine or specific antiviral; officials urge soap-and-water handwashing because sanitizer works poorly, bleach-based surface disinfection, careful food handling, and staying home for about 48 hours after symptoms end.